25400423 has 4 divisors (see below), whose sum is σ = 25748448. Its totient is φ = 25052400.

The previous prime is 25400411. The next prime is 25400449. The reversal of 25400423 is 32400452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25400423 - 2¹⁰ = 25399399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25400395 and 25400404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25400483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173903 + ... + 174048.

It is an arithmetic number, because the mean of its divisors is an integer number (6437112).

Almost surely, 2^25400423 is an apocalyptic number.

25400423 is a deficient number, since it is larger than the sum of its proper divisors (348025).

25400423 is an equidigital number, since it uses as much as digits as its factorization.

25400423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348024.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 25400423 is about 5039.8832327743. The cubic root of 25400423 is about 293.9546376709.

Adding to 25400423 its reverse (32400452), we get a palindrome (57800875).

It can be divided in two parts, 25 and 400423, that multiplied together give a triangular number (10010575 = T₄₄₇₄).

The spelling of 25400423 in words is "twenty-five million, four hundred thousand, four hundred twenty-three".